Merge "Update aosp/master LLVM for rebase to r230699."

1 files changed, 97 insertions, 0 deletions

diff --git a/lib/DebugInfo/DWARF/DWARFAbbreviationDeclaration.cpp b/lib/DebugInfo/DWARF/DWARFAbbreviationDeclaration.cpp
new file mode 100644
index 0000000..9314c9e
--- /dev/null
+++ b/lib/DebugInfo/DWARF/DWARFAbbreviationDeclaration.cpp
@@ -0,0 +1,97 @@
+//===-- DWARFAbbreviationDeclaration.cpp ----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+using namespace dwarf;
+
+void DWARFAbbreviationDeclaration::clear() {
+  Code = 0;
+  Tag = 0;
+  HasChildren = false;
+  AttributeSpecs.clear();
+}
+
+DWARFAbbreviationDeclaration::DWARFAbbreviationDeclaration() {
+  clear();
+}
+
+bool
+DWARFAbbreviationDeclaration::extract(DataExtractor Data, uint32_t* OffsetPtr) {
+  clear();
+  Code = Data.getULEB128(OffsetPtr);
+  if (Code == 0) {
+    return false;
+  }
+  Tag = Data.getULEB128(OffsetPtr);
+  uint8_t ChildrenByte = Data.getU8(OffsetPtr);
+  HasChildren = (ChildrenByte == DW_CHILDREN_yes);
+
+  while (true) {
+    uint32_t CurOffset = *OffsetPtr;
+    uint16_t Attr = Data.getULEB128(OffsetPtr);
+    if (CurOffset == *OffsetPtr) {
+      clear();
+      return false;
+    }
+    CurOffset = *OffsetPtr;
+    uint16_t Form = Data.getULEB128(OffsetPtr);
+    if (CurOffset == *OffsetPtr) {
+      clear();
+      return false;
+    }
+    if (Attr == 0 && Form == 0)
+      break;
+    AttributeSpecs.push_back(AttributeSpec(Attr, Form));
+  }
+
+  if (Tag == 0) {
+    clear();
+    return false;
+  }
+  return true;
+}
+
+void DWARFAbbreviationDeclaration::dump(raw_ostream &OS) const {
+  const char *tagString = TagString(getTag());
+  OS << '[' << getCode() << "] ";
+  if (tagString)
+    OS << tagString;
+  else
+    OS << format("DW_TAG_Unknown_%x", getTag());
+  OS << "\tDW_CHILDREN_" << (hasChildren() ? "yes" : "no") << '\n';
+  for (const AttributeSpec &Spec : AttributeSpecs) {
+    OS << '\t';
+    const char *attrString = AttributeString(Spec.Attr);
+    if (attrString)
+      OS << attrString;
+    else
+      OS << format("DW_AT_Unknown_%x", Spec.Attr);
+    OS << '\t';
+    const char *formString = FormEncodingString(Spec.Form);
+    if (formString)
+      OS << formString;
+    else
+      OS << format("DW_FORM_Unknown_%x", Spec.Form);
+    OS << '\n';
+  }
+  OS << '\n';
+}
+
+uint32_t
+DWARFAbbreviationDeclaration::findAttributeIndex(uint16_t attr) const {
+  for (uint32_t i = 0, e = AttributeSpecs.size(); i != e; ++i) {
+    if (AttributeSpecs[i].Attr == attr)
+      return i;
+  }
+  return -1U;
+}